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* Add verbose option, by default do not print mafft messages
* Make --annotation-table argument take a single filename (rather than
comma-delimited) and allow the option to be used multiple times. E.g.:
flutile aadiff --annotation-table foo.txt --annotation-table bar.txt
* Migrate from Travis to GitHub Actions for CI
* Add MyPy type annotations
* Removed mixed data from test files